Intent info

最新推荐文章于 2024-12-05 08:57:52 发布

原创最新推荐文章于 2024-12-05 08:57:52 发布 · 373 阅读

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#service #action #input

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Description

1 明确指定start an activity or service

2 broadcast that an event (or action) has occurred

3 Declare your intention that an Activity or Service be started to perform an action, usually
with (or on) a particular piece of data

Using Intents to Launch Activities

startActivity(myIntent);

private static final int SHOW_SUBACTIVITY = 1;
Intent intent = new Intent(this, MyOtherActivity.class);
startActivityForResult(intent, SHOW_SUBACTIVITY);

Explicitly Starting New Activities

Intent intent = new Intent(MyActivity.this, MyOtherActivity.class);
startActivity(intent);

Implicit Intents and Late Runtime Binding

Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:123-4567"));
startActivity(intent);

Handling Sub-Activity Results

private static final int SHOW_SUB_ACTIVITY_ONE = 1;
private static final int SHOW_SUB_ACTIVITY_TWO = 2;
@Override
public void onActivityResult(int requestCode,int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode) {
case (SHOW_SUB_ACTIVITY_ONE) : {
if (resultCode == Activity.RESULT_OK) {
Uri horse = data.getData();
boolean inputCorrect = data.getBooleanExtra(IS_INPUT_CORR
String selectedPistol = data.getStringExtra(SELECTED_PIST
}
break;
}
case (SHOW_SUB_ACTIVITY_TWO) : {
if (resultCode == Activity.RESULT_OK) {
// TODO: Handle OK click.
}
break;
}
}
}